Add support for XFAILing valgrind runs with memory leak checking independently
of runs without leak checking.  We add -vg to the triple for non-checked runs,
or -vg_leak for checked runs.  Also use this to XFAIL the TableGen tests, since
tablegen leaks like a sieve.  This includes some valgrindArgs refactoring.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99103 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/TableGen/lisp.td b/test/TableGen/lisp.td
index 3e392fd..b521e04 100644
--- a/test/TableGen/lisp.td
+++ b/test/TableGen/lisp.td
@@ -1,4 +1,5 @@
 // RUN: tblgen %s | grep {}
+// XFAIL: vg_leak
 
 class List<list<string> n> {
   list<string> names = n;